package personalize;

import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Image;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.io.File;

import javax.swing.ImageIcon;
import javax.swing.JComponent;
import javax.swing.JFileChooser;
/* ImagePreview.java by FileChooserDemo2.java. */
@SuppressWarnings("serial")
public class FileImagePreview extends JComponent
implements PropertyChangeListener {
	ImageIcon thumbnail = null;
	File file = null;
	public FileImagePreview(JFileChooser fc) {
		setPreferredSize(new Dimension(200, 200));
		fc.addPropertyChangeListener(this);
	}     public void loadImage() {
		if (file == null) {
			thumbnail = null;
			return;
		}
		//Don't use createImageIcon (which is a wrapper for getResource)
		//because the image we're trying to load is probably not one
		//of this program's own resources.
		ImageIcon tmpIcon = new ImageIcon(file.getPath());
		if (tmpIcon != null)
			if (tmpIcon.getIconWidth() > 149)
				thumbnail = new ImageIcon(tmpIcon.getImage().
						getScaledInstance(200, 200,	Image.SCALE_FAST));
			else
				//no need to miniaturize
				thumbnail = tmpIcon;
	}
	@Override
	public void propertyChange(PropertyChangeEvent e) {
		boolean update = false;
		String prop = e.getPropertyName();
		//If the directory changed, don't show an image.
		if (JFileChooser.DIRECTORY_CHANGED_PROPERTY.equals(prop)) {
			file = null;
			update = true;
			//If a file became selected, find out which one.
		} else if (JFileChooser.SELECTED_FILE_CHANGED_PROPERTY.equals(prop)) {
			file = (File) e.getNewValue();
			update = true;        }
		//Update the preview accordingly.
		if (update) {
			thumbnail = null;
			if (isShowing()) {
				loadImage();
				repaint();
			}
		}
	}
	@Override
	protected void paintComponent(Graphics g) {
		if (thumbnail == null)
			loadImage();
		if (thumbnail != null) {
			int x = getWidth()/2 - thumbnail.getIconWidth()/2;
			int y = getHeight()/2 - thumbnail.getIconHeight()/2;
			if (y < 0)
				y = 0;
			if (x < 5)
				x = 5;
			thumbnail.paintIcon(this, g, x, y);
		}
	}
}

